initial commit
copy files of idump ver0.0
remove unused code
merge util.h to idump.c
update makefile
remove my_{ceil,pow}
add -lm option
add wrapper scripts ndump/pdump
add usage
add README
modify usage()
append to README
add related codes of libnsgif/libnsbmp/libpng/libjpeg
add libns{gif,bmp} files and update makefile
remove log.h dependency
add support image format to README
another idump not using libpng/libjpeg
add lodepng files
create lib/script dir and move files
append license to README